/*!
 * iScroll v4.2.5 ~ Copyright (c) 2012 Matteo Spinelli, http://cubiq.org
 * Released under MIT license, http://cubiq.org/license
 */
(function(window, doc) {
	var m = Math,
		dummyStyle = doc.createElement('div').style,
		vendor = (function() {
			var vendors = 't,webkitT,MozT,msT,OT'.split(','),
				t,
				i = 0,
				l = vendors.length;

			for (; i < l; i++) {
				t = vendors[i] + 'ransform';
				if (t in dummyStyle) {
					return vendors[i].substr(0, vendors[i].length - 1);
				}
			}

			return false;
		})(),
		cssVendor = vendor ? '-' + vendor.toLowerCase() + '-' : '',

		// Style properties
		transform = prefixStyle('transform'),
		transitionProperty = prefixStyle('transitionProperty'),
		transitionDuration = prefixStyle('transitionDuration'),
		transformOrigin = prefixStyle('transformOrigin'),
		transitionTimingFunction = prefixStyle('transitionTimingFunction'),
		transitionDelay = prefixStyle('transitionDelay'),

		// Browser capabilities
		isAndroid = (/android/gi).test(navigator.appVersion),
		isIDevice = (/iphone|ipad/gi).test(navigator.appVersion),
		isTouchPad = (/hp-tablet/gi).test(navigator.appVersion),

		has3d = prefixStyle('perspective') in dummyStyle,
		hasTouch = 'ontouchstart' in window && !isTouchPad,
		hasTransform = vendor !== false,
		hasTransitionEnd = prefixStyle('transition') in dummyStyle,

		RESIZE_EV = 'onorientationchange' in window ? 'orientationchange' : 'resize',
		START_EV = hasTouch ? 'touchstart' : 'mousedown',
		MOVE_EV = hasTouch ? 'touchmove' : 'mousemove',
		END_EV = hasTouch ? 'touchend' : 'mouseup',
		CANCEL_EV = hasTouch ? 'touchcancel' : 'mouseup',
		TRNEND_EV = (function() {
			if (vendor === false) return false;

			var transitionEnd = {
				'': 'transitionend',
				'webkit': 'webkitTransitionEnd',
				'Moz': 'transitionend',
				'O': 'otransitionend',
				'ms': 'MSTransitionEnd'
			};

			return transitionEnd[vendor];
		})(),

		nextFrame = (function() {
			return window.requestAnimationFrame ||
				window.webkitRequestAnimationFrame ||
				window.mozRequestAnimationFrame ||
				window.oRequestAnimationFrame ||
				window.msRequestAnimationFrame ||
				function(callback) {
					return setTimeout(callback, 1);
				};
		})(),
		cancelFrame = (function() {
			return window.cancelRequestAnimationFrame ||
				window.webkitCancelAnimationFrame ||
				window.webkitCancelRequestAnimationFrame ||
				window.mozCancelRequestAnimationFrame ||
				window.oCancelRequestAnimationFrame ||
				window.msCancelRequestAnimationFrame ||
				clearTimeout;
		})(),

		// Helpers
		translateZ = has3d ? ' translateZ(0)' : '',

		// Constructor
		iScroll = function(el, options) {
			var that = this,
				i;

			that.wrapper = typeof el == 'object' ? el : doc.getElementById(el);
			that.wrapper.style.overflow = 'hidden';
			that.scroller = that.wrapper.children[0];

			// Default options
			that.options = {
				hScroll: true,
				vScroll: true,
				x: 0,
				y: 0,
				bounce: true,
				bounceLock: false,
				momentum: true,
				lockDirection: true,
				useTransform: true,
				useTransition: false,
				topOffset: 0,
				checkDOMChanges: false, // Experimental
				handleClick: true,

				// Scrollbar
				hScrollbar: true,
				vScrollbar: true,
				fixedScrollbar: isAndroid,
				hideScrollbar: isIDevice,
				fadeScrollbar: isIDevice && has3d,
				scrollbarClass: '',

				// Zoom
				zoom: false,
				zoomMin: 1,
				zoomMax: 4,
				doubleTapZoom: 2,
				wheelAction: 'scroll',

				// Snap
				snap: false,
				snapThreshold: 1,

				// Events
				onRefresh: null,
				onBeforeScrollStart: function(e) {
					// e.preventDefault();  这是原来的
					var target = e.target;
					while (target.nodeType != 1) target = target.parentNode;
					if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA')
						e.preventDefault();

				},
				onScrollStart: null,
				onBeforeScrollMove: null,
				onScrollMove: null,
				onBeforeScrollEnd: null,
				onScrollEnd: null,
				onTouchEnd: null,
				onDestroy: null,
				onZoomStart: null,
				onZoom: null,
				onZoomEnd: null
			};

			// User defined options
			for (i in options) that.options[i] = options[i];

			// Set starting position
			that.x = that.options.x;
			that.y = that.options.y;

			// Normalize options
			that.options.useTransform = hasTransform && that.options.useTransform;
			that.options.hScrollbar = that.options.hScroll && that.options.hScrollbar;
			that.options.vScrollbar = that.options.vScroll && that.options.vScrollbar;
			that.options.zoom = that.options.useTransform && that.options.zoom;
			that.options.useTransition = hasTransitionEnd && that.options.useTransition;

			// Helpers FIX ANDROID BUG!
			// translate3d and scale doesn't work together!
			// Ignoring 3d ONLY WHEN YOU SET that.options.zoom
			if (that.options.zoom && isAndroid) {
				translateZ = '';
			}

			// Set some default styles
			that.scroller.style[transitionProperty] = that.options.useTransform ? cssVendor + 'transform' : 'top left';
			that.scroller.style[transitionDuration] = '0';
			that.scroller.style[transformOrigin] = '0 0';
			if (that.options.useTransition) that.scroller.style[transitionTimingFunction] = 'cubic-bezier(0.33,0.66,0.66,1)';

			if (that.options.useTransform) that.scroller.style[transform] = 'translate(' + that.x + 'px,' + that.y + 'px)' +
				translateZ;
			else that.scroller.style.cssText += ';position:absolute;top:' + that.y + 'px;left:' + that.x + 'px';

			if (that.options.useTransition) that.options.fixedScrollbar = true;

			that.refresh();

			that._bind(RESIZE_EV, window);
			that._bind(START_EV);
			if (!hasTouch) {
				if (that.options.wheelAction != 'none') {
					that._bind('DOMMouseScroll');
					that._bind('mousewheel');
				}
			}

			if (that.options.checkDOMChanges) that.checkDOMTime = setInterval(function() {
				that._checkDOMChanges();
			}, 500);
		};

	// Prototype
	iScroll.prototype = {
		enabled: true,
		x: 0,
		y: 0,
		steps: [],
		scale: 1,
		currPageX: 0,
		currPageY: 0,
		pagesX: [],
		pagesY: [],
		aniTime: null,
		wheelZoomCount: 0,

		handleEvent: function(e) {
			var that = this;
			switch (e.type) {
				case START_EV:
					if (!hasTouch && e.button !== 0) return;
					that._start(e);
					break;
				case MOVE_EV:
					that._move(e);
					break;
				case END_EV:
				case CANCEL_EV:
					that._end(e);
					break;
				case RESIZE_EV:
					that._resize();
					break;
				case 'DOMMouseScroll':
				case 'mousewheel':
					that._wheel(e);
					break;
				case TRNEND_EV:
					that._transitionEnd(e);
					break;
			}
		},

		_checkDOMChanges: function() {
			if (this.moved || this.zoomed || this.animating ||
				(this.scrollerW == this.scroller.offsetWidth * this.scale && this.scrollerH == this.scroller.offsetHeight * this
					.scale)) return;

			this.refresh();
		},

		_scrollbar: function(dir) {
			var that = this,
				bar;

			if (!that[dir + 'Scrollbar']) {
				if (that[dir + 'ScrollbarWrapper']) {
					if (hasTransform) that[dir + 'ScrollbarIndicator'].style[transform] = '';
					that[dir + 'ScrollbarWrapper'].parentNode.removeChild(that[dir + 'ScrollbarWrapper']);
					that[dir + 'ScrollbarWrapper'] = null;
					that[dir + 'ScrollbarIndicator'] = null;
				}

				return;
			}

			if (!that[dir + 'ScrollbarWrapper']) {
				// Create the scrollbar wrapper
				bar = doc.createElement('div');

				if (that.options.scrollbarClass) bar.className = that.options.scrollbarClass + dir.toUpperCase();
				else bar.style.cssText = 'position:absolute;z-index:100;' + (dir == 'h' ?
					'height:7px;bottom:1px;left:2px;right:' + (that.vScrollbar ? '7' : '2') + 'px' : 'width:7px;bottom:' + (that.hScrollbar ?
						'7' : '2') + 'px;top:2px;right:1px');

				bar.style.cssText += ';pointer-events:none;' + cssVendor + 'transition-property:opacity;' + cssVendor +
					'transition-duration:' + (that.options.fadeScrollbar ? '350ms' : '0') + ';overflow:hidden;opacity:' + (that.options
						.hideScrollbar ? '0' : '1');

				that.wrapper.appendChild(bar);
				that[dir + 'ScrollbarWrapper'] = bar;

				// Create the scrollbar indicator
				bar = doc.createElement('div');
				if (!that.options.scrollbarClass) {
					bar.style.cssText =
						'position:absolute;z-index:100;background:rgba(0,0,0,0.5);border:1px solid rgba(255,255,255,0.9);' + cssVendor +
						'background-clip:padding-box;' + cssVendor + 'box-sizing:border-box;' + (dir == 'h' ? 'height:100%' :
							'width:100%') + ';' + cssVendor + 'border-radius:3px;border-radius:3px';
				}
				bar.style.cssText += ';pointer-events:none;' + cssVendor + 'transition-property:' + cssVendor + 'transform;' +
					cssVendor + 'transition-timing-function:cubic-bezier(0.33,0.66,0.66,1);' + cssVendor + 'transition-duration:0;' +
					cssVendor + 'transform: translate(0,0)' + translateZ;
				if (that.options.useTransition) bar.style.cssText += ';' + cssVendor +
					'transition-timing-function:cubic-bezier(0.33,0.66,0.66,1)';

				that[dir + 'ScrollbarWrapper'].appendChild(bar);
				that[dir + 'ScrollbarIndicator'] = bar;
			}

			if (dir == 'h') {
				that.hScrollbarSize = that.hScrollbarWrapper.clientWidth;
				that.hScrollbarIndicatorSize = m.max(m.round(that.hScrollbarSize * that.hScrollbarSize / that.scrollerW), 8);
				that.hScrollbarIndicator.style.width = that.hScrollbarIndicatorSize + 'px';
				that.hScrollbarMaxScroll = that.hScrollbarSize - that.hScrollbarIndicatorSize;
				that.hScrollbarProp = that.hScrollbarMaxScroll / that.maxScrollX;
			} else {
				that.vScrollbarSize = that.vScrollbarWrapper.clientHeight;
				that.vScrollbarIndicatorSize = m.max(m.round(that.vScrollbarSize * that.vScrollbarSize / that.scrollerH), 8);
				that.vScrollbarIndicator.style.height = that.vScrollbarIndicatorSize + 'px';
				that.vScrollbarMaxScroll = that.vScrollbarSize - that.vScrollbarIndicatorSize;
				that.vScrollbarProp = that.vScrollbarMaxScroll / that.maxScrollY;
			}

			// Reset position
			that._scrollbarPos(dir, true);
		},

		_resize: function() {
			var that = this;
			setTimeout(function() {
				that.refresh();
			}, isAndroid ? 200 : 0);
		},

		_pos: function(x, y) {
			if (this.zoomed) return;

			x = this.hScroll ? x : 0;
			y = this.vScroll ? y : 0;

			if (this.options.useTransform) {
				this.scroller.style[transform] = 'translate(' + x + 'px,' + y + 'px) scale(' + this.scale + ')' + translateZ;
			} else {
				x = m.round(x);
				y = m.round(y);
				this.scroller.style.left = x + 'px';
				this.scroller.style.top = y + 'px';
			}

			this.x = x;
			this.y = y;

			this._scrollbarPos('h');
			this._scrollbarPos('v');
		},

		_scrollbarPos: function(dir, hidden) {
			var that = this,
				pos = dir == 'h' ? that.x : that.y,
				size;

			if (!that[dir + 'Scrollbar']) return;

			pos = that[dir + 'ScrollbarProp'] * pos;

			if (pos < 0) {
				if (!that.options.fixedScrollbar) {
					size = that[dir + 'ScrollbarIndicatorSize'] + m.round(pos * 3);
					if (size < 8) size = 8;
					that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px';
				}
				pos = 0;
			} else if (pos > that[dir + 'ScrollbarMaxScroll']) {
				if (!that.options.fixedScrollbar) {
					size = that[dir + 'ScrollbarIndicatorSize'] - m.round((pos - that[dir + 'ScrollbarMaxScroll']) * 3);
					if (size < 8) size = 8;
					that[dir + 'ScrollbarIndicator'].style[dir == 'h' ? 'width' : 'height'] = size + 'px';
					pos = that[dir + 'ScrollbarMaxScroll'] + (that[dir + 'ScrollbarIndicatorSize'] - size);
				} else {
					pos = that[dir + 'ScrollbarMaxScroll'];
				}
			}

			that[dir + 'ScrollbarWrapper'].style[transitionDelay] = '0';
			that[dir + 'ScrollbarWrapper'].style.opacity = hidden && that.options.hideScrollbar ? '0' : '1';
			that[dir + 'ScrollbarIndicator'].style[transform] = 'translate(' + (dir == 'h' ? pos + 'px,0)' : '0,' + pos +
				'px)') + translateZ;
		},

		_start: function(e) {
			var that = this,
				point = hasTouch ? e.touches[0] : e,
				matrix, x, y,
				c1, c2;

			if (!that.enabled) return;

			if (that.options.onBeforeScrollStart) that.options.onBeforeScrollStart.call(that, e);

			if (that.options.useTransition || that.options.zoom) that._transitionTime(0);

			that.moved = false;
			that.animating = false;
			that.zoomed = false;
			that.distX = 0;
			that.distY = 0;
			that.absDistX = 0;
			that.absDistY = 0;
			that.dirX = 0;
			that.dirY = 0;

			// Gesture start
			if (that.options.zoom && hasTouch && e.touches.length > 1) {
				c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
				c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
				that.touchesDistStart = m.sqrt(c1 * c1 + c2 * c2);

				that.originX = m.abs(e.touches[0].pageX + e.touches[1].pageX - that.wrapperOffsetLeft * 2) / 2 - that.x;
				that.originY = m.abs(e.touches[0].pageY + e.touches[1].pageY - that.wrapperOffsetTop * 2) / 2 - that.y;

				if (that.options.onZoomStart) that.options.onZoomStart.call(that, e);
			}

			if (that.options.momentum) {
				if (that.options.useTransform) {
					// Very lame general purpose alternative to CSSMatrix
					matrix = getComputedStyle(that.scroller, null)[transform].replace(/[^0-9\-.,]/g, '').split(',');
					x = +(matrix[12] || matrix[4]);
					y = +(matrix[13] || matrix[5]);
				} else {
					x = +getComputedStyle(that.scroller, null).left.replace(/[^0-9-]/g, '');
					y = +getComputedStyle(that.scroller, null).top.replace(/[^0-9-]/g, '');
				}

				if (x != that.x || y != that.y) {
					if (that.options.useTransition) that._unbind(TRNEND_EV);
					else cancelFrame(that.aniTime);
					that.steps = [];
					that._pos(x, y);
					if (that.options.onScrollEnd) that.options.onScrollEnd.call(that);
				}
			}

			that.absStartX = that.x; // Needed by snap threshold
			that.absStartY = that.y;

			that.startX = that.x;
			that.startY = that.y;
			that.pointX = point.pageX;
			that.pointY = point.pageY;

			that.startTime = e.timeStamp || Date.now();

			if (that.options.onScrollStart) that.options.onScrollStart.call(that, e);

			that._bind(MOVE_EV, window);
			that._bind(END_EV, window);
			that._bind(CANCEL_EV, window);
		},

		_move: function(e) {
			var that = this,
				point = hasTouch ? e.touches[0] : e,
				deltaX = point.pageX - that.pointX,
				deltaY = point.pageY - that.pointY,
				newX = that.x + deltaX,
				newY = that.y + deltaY,
				c1, c2, scale,
				timestamp = e.timeStamp || Date.now();

			if (that.options.onBeforeScrollMove) that.options.onBeforeScrollMove.call(that, e);

			// Zoom
			if (that.options.zoom && hasTouch && e.touches.length > 1) {
				c1 = m.abs(e.touches[0].pageX - e.touches[1].pageX);
				c2 = m.abs(e.touches[0].pageY - e.touches[1].pageY);
				that.touchesDist = m.sqrt(c1 * c1 + c2 * c2);

				that.zoomed = true;

				scale = 1 / that.touchesDistStart * that.touchesDist * this.scale;

				if (scale < that.options.zoomMin) scale = 0.5 * that.options.zoomMin * Math.pow(2.0, scale / that.options.zoomMin);
				else if (scale > that.options.zoomMax) scale = 2.0 * that.options.zoomMax * Math.pow(0.5, that.options.zoomMax /
					scale);

				that.lastScale = scale / this.scale;

				newX = this.originX - this.originX * that.lastScale + this.x,
					newY = this.originY - this.originY * that.lastScale + this.y;

				this.scroller.style[transform] = 'translate(' + newX + 'px,' + newY + 'px) scale(' + scale + ')' + translateZ;

				if (that.options.onZoom) that.options.onZoom.call(that, e);
				return;
			}

			that.pointX = point.pageX;
			that.pointY = point.pageY;

			// Slow down if outside of the boundaries
			if (newX > 0 || newX < that.maxScrollX) {
				newX = that.options.bounce ? that.x + (deltaX / 2) : newX >= 0 || that.maxScrollX >= 0 ? 0 : that.maxScrollX;
			}
			if (newY > that.minScrollY || newY < that.maxScrollY) {
				newY = that.options.bounce ? that.y + (deltaY / 2) : newY >= that.minScrollY || that.maxScrollY >= 0 ? that.minScrollY :
					that.maxScrollY;
			}

			that.distX += deltaX;
			that.distY += deltaY;
			that.absDistX = m.abs(that.distX);
			that.absDistY = m.abs(that.distY);

			if (that.absDistX < 6 && that.absDistY < 6) {
				return;
			}

			// Lock direction
			if (that.options.lockDirection) {
				if (that.absDistX > that.absDistY + 5) {
					newY = that.y;
					deltaY = 0;
				} else if (that.absDistY > that.absDistX + 5) {
					newX = that.x;
					deltaX = 0;
				}
			}

			that.moved = true;
			that._pos(newX, newY);
			that.dirX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
			that.dirY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;

			if (timestamp - that.startTime > 300) {
				that.startTime = timestamp;
				that.startX = that.x;
				that.startY = that.y;
			}

			if (that.options.onScrollMove) that.options.onScrollMove.call(that, e);
		},

		_end: function(e) {
			if (hasTouch && e.touches.length !== 0) return;

			var that = this,
				point = hasTouch ? e.changedTouches[0] : e,
				target, ev,
				momentumX = {
					dist: 0,
					time: 0
				},
				momentumY = {
					dist: 0,
					time: 0
				},
				duration = (e.timeStamp || Date.now()) - that.startTime,
				newPosX = that.x,
				newPosY = that.y,
				distX, distY,
				newDuration,
				snap,
				scale;

			that._unbind(MOVE_EV, window);
			that._unbind(END_EV, window);
			that._unbind(CANCEL_EV, window);

			if (that.options.onBeforeScrollEnd) that.options.onBeforeScrollEnd.call(that, e);

			if (that.zoomed) {
				scale = that.scale * that.lastScale;
				scale = Math.max(that.options.zoomMin, scale);
				scale = Math.min(that.options.zoomMax, scale);
				that.lastScale = scale / that.scale;
				that.scale = scale;

				that.x = that.originX - that.originX * that.lastScale + that.x;
				that.y = that.originY - that.originY * that.lastScale + that.y;

				that.scroller.style[transitionDuration] = '200ms';
				that.scroller.style[transform] = 'translate(' + that.x + 'px,' + that.y + 'px) scale(' + that.scale + ')' +
					translateZ;

				that.zoomed = false;
				that.refresh();

				if (that.options.onZoomEnd) that.options.onZoomEnd.call(that, e);
				return;
			}

			if (!that.moved) {
				if (hasTouch) {
					if (that.doubleTapTimer && that.options.zoom) {
						// Double tapped
						clearTimeout(that.doubleTapTimer);
						that.doubleTapTimer = null;
						if (that.options.onZoomStart) that.options.onZoomStart.call(that, e);
						that.zoom(that.pointX, that.pointY, that.scale == 1 ? that.options.doubleTapZoom : 1);
						if (that.options.onZoomEnd) {
							setTimeout(function() {
								that.options.onZoomEnd.call(that, e);
							}, 200); // 200 is default zoom duration
						}
					} else if (this.options.handleClick) {
						that.doubleTapTimer = setTimeout(function() {
							that.doubleTapTimer = null;

							// Find the last touched element
							target = point.target;
							while (target.nodeType != 1) target = target.parentNode;

							if (target.tagName != 'SELECT' && target.tagName != 'INPUT' && target.tagName != 'TEXTAREA') {
								ev = doc.createEvent('MouseEvents');
								ev.initMouseEvent('click', true, true, e.view, 1,
									point.screenX, point.screenY, point.clientX, point.clientY,
									e.ctrlKey, e.altKey, e.shiftKey, e.metaKey,
									0, null);
								ev._fake = true;
								target.dispatchEvent(ev);
							}
						}, that.options.zoom ? 250 : 0);
					}
				}

				that._resetPos(400);

				if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
				return;
			}

			if (duration < 300 && that.options.momentum) {
				momentumX = newPosX ? that._momentum(newPosX - that.startX, duration, -that.x, that.scrollerW - that.wrapperW +
					that.x, that.options.bounce ? that.wrapperW : 0) : momentumX;
				momentumY = newPosY ? that._momentum(newPosY - that.startY, duration, -that.y, (that.maxScrollY < 0 ? that.scrollerH -
					that.wrapperH + that.y - that.minScrollY : 0), that.options.bounce ? that.wrapperH : 0) : momentumY;

				newPosX = that.x + momentumX.dist;
				newPosY = that.y + momentumY.dist;

				if ((that.x > 0 && newPosX > 0) || (that.x < that.maxScrollX && newPosX < that.maxScrollX)) momentumX = {
					dist: 0,
					time: 0
				};
				if ((that.y > that.minScrollY && newPosY > that.minScrollY) || (that.y < that.maxScrollY && newPosY < that.maxScrollY))
					momentumY = {
						dist: 0,
						time: 0
					};
			}

			if (momentumX.dist || momentumY.dist) {
				newDuration = m.max(m.max(momentumX.time, momentumY.time), 10);

				// Do we need to snap?
				if (that.options.snap) {
					distX = newPosX - that.absStartX;
					distY = newPosY - that.absStartY;
					if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) {
						that.scrollTo(that.absStartX, that.absStartY, 200);
					} else {
						snap = that._snap(newPosX, newPosY);
						newPosX = snap.x;
						newPosY = snap.y;
						newDuration = m.max(snap.time, newDuration);
					}
				}

				that.scrollTo(m.round(newPosX), m.round(newPosY), newDuration);

				if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
				return;
			}

			// Do we need to snap?
			if (that.options.snap) {
				distX = newPosX - that.absStartX;
				distY = newPosY - that.absStartY;
				if (m.abs(distX) < that.options.snapThreshold && m.abs(distY) < that.options.snapThreshold) that.scrollTo(that.absStartX,
					that.absStartY, 200);
				else {
					snap = that._snap(that.x, that.y);
					if (snap.x != that.x || snap.y != that.y) that.scrollTo(snap.x, snap.y, snap.time);
				}

				if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
				return;
			}

			that._resetPos(200);
			if (that.options.onTouchEnd) that.options.onTouchEnd.call(that, e);
		},

		_resetPos: function(time) {
			var that = this,
				resetX = that.x >= 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x,
				resetY = that.y >= that.minScrollY || that.maxScrollY > 0 ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY :
				that.y;

			if (resetX == that.x && resetY == that.y) {
				if (that.moved) {
					that.moved = false;
					if (that.options.onScrollEnd) that.options.onScrollEnd.call(that); // Execute custom code on scroll end
				}

				if (that.hScrollbar && that.options.hideScrollbar) {
					if (vendor == 'webkit') that.hScrollbarWrapper.style[transitionDelay] = '300ms';
					that.hScrollbarWrapper.style.opacity = '0';
				}
				if (that.vScrollbar && that.options.hideScrollbar) {
					if (vendor == 'webkit') that.vScrollbarWrapper.style[transitionDelay] = '300ms';
					that.vScrollbarWrapper.style.opacity = '0';
				}

				return;
			}

			that.scrollTo(resetX, resetY, time || 0);
		},

		_wheel: function(e) {
			var that = this,
				wheelDeltaX, wheelDeltaY,
				deltaX, deltaY,
				deltaScale;

			if ('wheelDeltaX' in e) {
				wheelDeltaX = e.wheelDeltaX / 12;
				wheelDeltaY = e.wheelDeltaY / 12;
			} else if ('wheelDelta' in e) {
				wheelDeltaX = wheelDeltaY = e.wheelDelta / 12;
			} else if ('detail' in e) {
				wheelDeltaX = wheelDeltaY = -e.detail * 3;
			} else {
				return;
			}

			if (that.options.wheelAction == 'zoom') {
				deltaScale = that.scale * Math.pow(2, 1 / 3 * (wheelDeltaY ? wheelDeltaY / Math.abs(wheelDeltaY) : 0));
				if (deltaScale < that.options.zoomMin) deltaScale = that.options.zoomMin;
				if (deltaScale > that.options.zoomMax) deltaScale = that.options.zoomMax;

				if (deltaScale != that.scale) {
					if (!that.wheelZoomCount && that.options.onZoomStart) that.options.onZoomStart.call(that, e);
					that.wheelZoomCount++;

					that.zoom(e.pageX, e.pageY, deltaScale, 400);

					setTimeout(function() {
						that.wheelZoomCount--;
						if (!that.wheelZoomCount && that.options.onZoomEnd) that.options.onZoomEnd.call(that, e);
					}, 400);
				}

				return;
			}

			deltaX = that.x + wheelDeltaX;
			deltaY = that.y + wheelDeltaY;

			if (deltaX > 0) deltaX = 0;
			else if (deltaX < that.maxScrollX) deltaX = that.maxScrollX;

			if (deltaY > that.minScrollY) deltaY = that.minScrollY;
			else if (deltaY < that.maxScrollY) deltaY = that.maxScrollY;

			if (that.maxScrollY < 0) {
				that.scrollTo(deltaX, deltaY, 0);
			}
		},

		_transitionEnd: function(e) {
			var that = this;

			if (e.target != that.scroller) return;

			that._unbind(TRNEND_EV);

			that._startAni();
		},


		/**
		 *
		 * Utilities
		 *
		 */
		_startAni: function() {
			var that = this,
				startX = that.x,
				startY = that.y,
				startTime = Date.now(),
				step, easeOut,
				animate;

			if (that.animating) return;

			if (!that.steps.length) {
				that._resetPos(400);
				return;
			}

			step = that.steps.shift();

			if (step.x == startX && step.y == startY) step.time = 0;

			that.animating = true;
			that.moved = true;

			if (that.options.useTransition) {
				that._transitionTime(step.time);
				that._pos(step.x, step.y);
				that.animating = false;
				if (step.time) that._bind(TRNEND_EV);
				else that._resetPos(0);
				return;
			}

			animate = function() {
				var now = Date.now(),
					newX, newY;

				if (now >= startTime + step.time) {
					that._pos(step.x, step.y);
					that.animating = false;
					if (that.options.onAnimationEnd) that.options.onAnimationEnd.call(that); // Execute custom code on animation end
					that._startAni();
					return;
				}

				now = (now - startTime) / step.time - 1;
				easeOut = m.sqrt(1 - now * now);
				newX = (step.x - startX) * easeOut + startX;
				newY = (step.y - startY) * easeOut + startY;
				that._pos(newX, newY);
				if (that.animating) that.aniTime = nextFrame(animate);
			};

			animate();
		},

		_transitionTime: function(time) {
			time += 'ms';
			this.scroller.style[transitionDuration] = time;
			if (this.hScrollbar) this.hScrollbarIndicator.style[transitionDuration] = time;
			if (this.vScrollbar) this.vScrollbarIndicator.style[transitionDuration] = time;
		},

		_momentum: function(dist, time, maxDistUpper, maxDistLower, size) {
			var deceleration = 0.0006,
				speed = m.abs(dist) / time,
				newDist = (speed * speed) / (2 * deceleration),
				newTime = 0,
				outsideDist = 0;

			// Proportinally reduce speed if we are outside of the boundaries
			if (dist > 0 && newDist > maxDistUpper) {
				outsideDist = size / (6 / (newDist / speed * deceleration));
				maxDistUpper = maxDistUpper + outsideDist;
				speed = speed * maxDistUpper / newDist;
				newDist = maxDistUpper;
			} else if (dist < 0 && newDist > maxDistLower) {
				outsideDist = size / (6 / (newDist / speed * deceleration));
				maxDistLower = maxDistLower + outsideDist;
				speed = speed * maxDistLower / newDist;
				newDist = maxDistLower;
			}

			newDist = newDist * (dist < 0 ? -1 : 1);
			newTime = speed / deceleration;

			return {
				dist: newDist,
				time: m.round(newTime)
			};
		},

		_offset: function(el) {
			var left = -el.offsetLeft,
				top = -el.offsetTop;

			while (el = el.offsetParent) {
				left -= el.offsetLeft;
				top -= el.offsetTop;
			}

			if (el != this.wrapper) {
				left *= this.scale;
				top *= this.scale;
			}

			return {
				left: left,
				top: top
			};
		},

		_snap: function(x, y) {
			var that = this,
				i, l,
				page, time,
				sizeX, sizeY;

			// Check page X
			page = that.pagesX.length - 1;
			for (i = 0, l = that.pagesX.length; i < l; i++) {
				if (x >= that.pagesX[i]) {
					page = i;
					break;
				}
			}
			if (page == that.currPageX && page > 0 && that.dirX < 0) page--;
			x = that.pagesX[page];
			sizeX = m.abs(x - that.pagesX[that.currPageX]);
			sizeX = sizeX ? m.abs(that.x - x) / sizeX * 500 : 0;
			that.currPageX = page;

			// Check page Y
			page = that.pagesY.length - 1;
			for (i = 0; i < page; i++) {
				if (y >= that.pagesY[i]) {
					page = i;
					break;
				}
			}
			if (page == that.currPageY && page > 0 && that.dirY < 0) page--;
			y = that.pagesY[page];
			sizeY = m.abs(y - that.pagesY[that.currPageY]);
			sizeY = sizeY ? m.abs(that.y - y) / sizeY * 500 : 0;
			that.currPageY = page;

			// Snap with constant speed (proportional duration)
			time = m.round(m.max(sizeX, sizeY)) || 200;

			return {
				x: x,
				y: y,
				time: time
			};
		},

		_bind: function(type, el, bubble) {
			(el || this.scroller).addEventListener(type, this, !!bubble);
		},

		_unbind: function(type, el, bubble) {
			(el || this.scroller).removeEventListener(type, this, !!bubble);
		},


		/**
		 *
		 * Public methods
		 *
		 */
		destroy: function() {
			var that = this;

			that.scroller.style[transform] = '';

			// Remove the scrollbars
			that.hScrollbar = false;
			that.vScrollbar = false;
			that._scrollbar('h');
			that._scrollbar('v');

			// Remove the event listeners
			that._unbind(RESIZE_EV, window);
			that._unbind(START_EV);
			that._unbind(MOVE_EV, window);
			that._unbind(END_EV, window);
			that._unbind(CANCEL_EV, window);

			if (!that.options.hasTouch) {
				that._unbind('DOMMouseScroll');
				that._unbind('mousewheel');
			}

			if (that.options.useTransition) that._unbind(TRNEND_EV);

			if (that.options.checkDOMChanges) clearInterval(that.checkDOMTime);

			if (that.options.onDestroy) that.options.onDestroy.call(that);
		},

		refresh: function() {
			var that = this,
				offset,
				i, l,
				els,
				pos = 0,
				page = 0;

			if (that.scale < that.options.zoomMin) that.scale = that.options.zoomMin;
			that.wrapperW = that.wrapper.clientWidth || 1;
			that.wrapperH = that.wrapper.clientHeight || 1;

			that.minScrollY = -that.options.topOffset || 0;
			that.scrollerW = m.round(that.scroller.offsetWidth * that.scale);
			that.scrollerH = m.round((that.scroller.offsetHeight + that.minScrollY) * that.scale);
			that.maxScrollX = that.wrapperW - that.scrollerW;
			that.maxScrollY = that.wrapperH - that.scrollerH + that.minScrollY;
			that.dirX = 0;
			that.dirY = 0;

			if (that.options.onRefresh) that.options.onRefresh.call(that);

			that.hScroll = that.options.hScroll && that.maxScrollX < 0;
			that.vScroll = that.options.vScroll && (!that.options.bounceLock && !that.hScroll || that.scrollerH > that.wrapperH);

			that.hScrollbar = that.hScroll && that.options.hScrollbar;
			that.vScrollbar = that.vScroll && that.options.vScrollbar && that.scrollerH > that.wrapperH;

			offset = that._offset(that.wrapper);
			that.wrapperOffsetLeft = -offset.left;
			that.wrapperOffsetTop = -offset.top;

			// Prepare snap
			if (typeof that.options.snap == 'string') {
				that.pagesX = [];
				that.pagesY = [];
				els = that.scroller.querySelectorAll(that.options.snap);
				for (i = 0, l = els.length; i < l; i++) {
					pos = that._offset(els[i]);
					pos.left += that.wrapperOffsetLeft;
					pos.top += that.wrapperOffsetTop;
					that.pagesX[i] = pos.left < that.maxScrollX ? that.maxScrollX : pos.left * that.scale;
					that.pagesY[i] = pos.top < that.maxScrollY ? that.maxScrollY : pos.top * that.scale;
				}
			} else if (that.options.snap) {
				that.pagesX = [];
				while (pos >= that.maxScrollX) {
					that.pagesX[page] = pos;
					pos = pos - that.wrapperW;
					page++;
				}
				if (that.maxScrollX % that.wrapperW) that.pagesX[that.pagesX.length] = that.maxScrollX - that.pagesX[that.pagesX
					.length - 1] + that.pagesX[that.pagesX.length - 1];

				pos = 0;
				page = 0;
				that.pagesY = [];
				while (pos >= that.maxScrollY) {
					that.pagesY[page] = pos;
					pos = pos - that.wrapperH;
					page++;
				}
				if (that.maxScrollY % that.wrapperH) that.pagesY[that.pagesY.length] = that.maxScrollY - that.pagesY[that.pagesY
					.length - 1] + that.pagesY[that.pagesY.length - 1];
			}

			// Prepare the scrollbars
			that._scrollbar('h');
			that._scrollbar('v');

			if (!that.zoomed) {
				that.scroller.style[transitionDuration] = '0';
				that._resetPos(400);
			}
		},

		scrollTo: function(x, y, time, relative) {
			var that = this,
				step = x,
				i, l;

			that.stop();

			if (!step.length) step = [{
				x: x,
				y: y,
				time: time,
				relative: relative
			}];

			for (i = 0, l = step.length; i < l; i++) {
				if (step[i].relative) {
					step[i].x = that.x - step[i].x;
					step[i].y = that.y - step[i].y;
				}
				that.steps.push({
					x: step[i].x,
					y: step[i].y,
					time: step[i].time || 0
				});
			}

			that._startAni();
		},

		scrollToElement: function(el, time) {
			var that = this,
				pos;
			el = el.nodeType ? el : that.scroller.querySelector(el);
			if (!el) return;

			pos = that._offset(el);
			pos.left += that.wrapperOffsetLeft;
			pos.top += that.wrapperOffsetTop;

			pos.left = pos.left > 0 ? 0 : pos.left < that.maxScrollX ? that.maxScrollX : pos.left;
			pos.top = pos.top > that.minScrollY ? that.minScrollY : pos.top < that.maxScrollY ? that.maxScrollY : pos.top;
			time = time === undefined ? m.max(m.abs(pos.left) * 2, m.abs(pos.top) * 2) : time;

			that.scrollTo(pos.left, pos.top, time);
		},

		scrollToPage: function(pageX, pageY, time) {
			var that = this,
				x, y;

			time = time === undefined ? 400 : time;

			if (that.options.onScrollStart) that.options.onScrollStart.call(that);

			if (that.options.snap) {
				pageX = pageX == 'next' ? that.currPageX + 1 : pageX == 'prev' ? that.currPageX - 1 : pageX;
				pageY = pageY == 'next' ? that.currPageY + 1 : pageY == 'prev' ? that.currPageY - 1 : pageY;

				pageX = pageX < 0 ? 0 : pageX > that.pagesX.length - 1 ? that.pagesX.length - 1 : pageX;
				pageY = pageY < 0 ? 0 : pageY > that.pagesY.length - 1 ? that.pagesY.length - 1 : pageY;

				that.currPageX = pageX;
				that.currPageY = pageY;
				x = that.pagesX[pageX];
				y = that.pagesY[pageY];
			} else {
				x = -that.wrapperW * pageX;
				y = -that.wrapperH * pageY;
				if (x < that.maxScrollX) x = that.maxScrollX;
				if (y < that.maxScrollY) y = that.maxScrollY;
			}

			that.scrollTo(x, y, time);
		},

		disable: function() {
			this.stop();
			this._resetPos(0);
			this.enabled = false;

			// If disabled after touchstart we make sure that there are no left over events
			this._unbind(MOVE_EV, window);
			this._unbind(END_EV, window);
			this._unbind(CANCEL_EV, window);
		},

		enable: function() {
			this.enabled = true;
		},

		stop: function() {
			if (this.options.useTransition) this._unbind(TRNEND_EV);
			else cancelFrame(this.aniTime);
			this.steps = [];
			this.moved = false;
			this.animating = false;
		},

		zoom: function(x, y, scale, time) {
			var that = this,
				relScale = scale / that.scale;

			if (!that.options.useTransform) return;

			that.zoomed = true;
			time = time === undefined ? 200 : time;
			x = x - that.wrapperOffsetLeft - that.x;
			y = y - that.wrapperOffsetTop - that.y;
			that.x = x - x * relScale + that.x;
			that.y = y - y * relScale + that.y;

			that.scale = scale;
			that.refresh();

			that.x = that.x > 0 ? 0 : that.x < that.maxScrollX ? that.maxScrollX : that.x;
			that.y = that.y > that.minScrollY ? that.minScrollY : that.y < that.maxScrollY ? that.maxScrollY : that.y;

			that.scroller.style[transitionDuration] = time + 'ms';
			that.scroller.style[transform] = 'translate(' + that.x + 'px,' + that.y + 'px) scale(' + scale + ')' + translateZ;
			that.zoomed = false;
		},

		isReady: function() {
			return !this.moved && !this.zoomed && !this.animating;
		}
	};

	function prefixStyle(style) {
		if (vendor === '') return style;

		style = style.charAt(0).toUpperCase() + style.substr(1);
		return vendor + style;
	}

	dummyStyle = null; // for the sake of it

	if (typeof exports !== 'undefined') exports.iScroll = iScroll;
	else window.iScroll = iScroll;

})(window, document);
